8
Application Notes
1. Conduct a leak check in a logical pro-
gression through the entire system to
locate all leaks. If surfaces are particu-
larly dirty, or wet, wipe them off with a
clean, dry cloth to reduce filter clog-
ging and extend sensor life. DO NOT
allow the unit to ingest moisture. Use
of the supplied rubber probe tip helps
prevent moisture from being drawn
into the unit. Check ports for moisture
before inserting the probe.
2. After locating and repairing any leaks
requiring the use of the
LARGE
setting,
switch to the
MEDIUM
setting and verify
the system is free of leaks. For HFC
refrigerants only (such as R134a), you
also must verify the system is leak free
using the
SMALL
setting. For CFC and
HCFC systems (such as R11, R12,
R22, R123), the
MEDIUM
setting is
sufficient to verify that the system is
free of leaks that require repairing.
Maintenance
To protect the air pump from damage
due to foreign particles and moisture,
replace the filter as it becomes dirty. With
moderate use (15 to 30 minutes a day),
it is recommended that the filter be
replaced once a month. In dirty environ-
ments or with heavy use, replace the
filter more often. Always replace the filter
when it is visibly dirty or wet.
Replacing the Filter:
1. Remove the black rubber probe tip.
2. Pick out the filter with a pin or tweezers.
A fine screen will remain in the tip of
the probe.
3. Insert the new filter in the probe tip.
